import gradio as gr
import pandas as pd
from googleapiclient.discovery import build
import plotly.express as px
import base64
import numpy as np
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.cluster import KMeans
import openai
from datetime import datetime, timedelta

def get_video_stats(api_key, video_id):
    youtube = build("youtube", "v3", developerKey=api_key)
    video_response = youtube.videos().list(
        part="snippet,statistics",
        id=video_id
    ).execute()

    video = video_response["items"][0]
    title = video["snippet"]["title"]
    channel_id = video["snippet"]["channelId"]
    publish_time = video["snippet"]["publishedAt"]
    view_count = int(video["statistics"].get("viewCount", 0))
    like_count = int(video["statistics"].get("likeCount", 0))
    comment_count = int(video["statistics"].get("commentCount", 0))

    return {
        "Video ID": video_id,
        "Title": title,
        "publishedAt": publish_time,
        "Channel ID": channel_id,
        "View Count": view_count,
        "Like Count": like_count,
        "Comment Count": comment_count
    }

def get_channel_stats(api_key, channel_id):
    youtube = build("youtube", "v3", developerKey=api_key)
    channel_response = youtube.channels().list(
        part="statistics",
        id=channel_id
    ).execute()

    if channel_response["items"]:
        channel = channel_response["items"][0]
        subscriber_count = int(channel["statistics"]["subscriberCount"])
    else:
        subscriber_count = 0

    return subscriber_count

def get_video_data(api_key, query, max_results, published_after, published_before):
    youtube = build("youtube", "v3", developerKey=api_key)
    video_ids = []
    next_page_token = None

    while len(video_ids) < max_results:
        search_response = youtube.search().list(
            q=query,
            type="video",
            part="id",
            maxResults=50,
            pageToken=next_page_token,
            order="viewCount",
            publishedAfter=published_after,
            publishedBefore=published_before
        ).execute()

        video_ids.extend([item["id"]["videoId"] for item in search_response["items"]])
        next_page_token = search_response.get("nextPageToken")

        if not next_page_token:
            break

    video_ids = video_ids[:max_results]

    video_stats = []
    for video_id in video_ids:
        stats = get_video_stats(api_key, video_id)
        channel_id = stats["Channel ID"]
        subscriber_count = get_channel_stats(api_key, channel_id)
        stats["Subscriber Count"] = subscriber_count
        video_stats.append(stats)

    video_stats_df = pd.DataFrame(video_stats)
    return video_stats_df

def download_csv(df, filename):
    csv = df.to_csv(index=False)
    b64 = base64.b64encode(csv.encode()).decode()
    href = f'<a href="data:file/csv;base64,{b64}" download="{filename}.csv">Download {filename} CSV</a>'
    return href

def visualize_video_ranking(video_stats_df):
    video_stats_df["Active_Index"] = video_stats_df["View Count"] / video_stats_df["Subscriber Count"]

    csv_download_link = download_csv(video_stats_df, "video_stats")

    fig = px.bar(video_stats_df, x="Video ID", y="Active_Index", color="View Count",
                 labels={"Video ID": "Video ID", "Active_Index": "Active_Index"},
                 title="Video Active Index")
    fig.update_layout(height=500, width=500)

    return video_stats_df, fig, csv_download_link

def analyze_titles(video_stats_df, openai_key, n_clusters=5):
    titles = video_stats_df['Title'].tolist()
    vectorizer = TfidfVectorizer()
    tfidf_matrix = vectorizer.fit_transform(titles)

    kmeans = KMeans(n_clusters=n_clusters, random_state=42)
    kmeans.fit(tfidf_matrix)
    labels = kmeans.labels_
    video_stats_df["Cluster"] = labels

    cluster_summaries = []
    for i in range(n_clusters):
        cluster_titles = video_stats_df[video_stats_df["Cluster"] == i]['Title'].tolist()
        cluster_text = ' '.join(cluster_titles)
        summary = summarize_cluster(cluster_text, openai_key, i)
        cluster_summaries.append(summary)

    cluster_summary_df = pd.DataFrame({'Cluster': range(n_clusters), 'Summary': cluster_summaries})
    return cluster_summary_df

def summarize_cluster(cluster_text, openai_key, cluster_num):
    openai.api_key = openai_key
    prompt = f"これらの動画を日本語で徹底解析して要約し、動画の特徴・人気要因を500文字以内で解説してください: {cluster_text}"
    response = openai.ChatCompletion.create(
        model="gpt-3.5-turbo",
        messages=[
            {"role": "system", "content": "あなたは世界中の人気動画や大規模データを解析してきた天才AI・データサイエンティストです"},
            {"role": "user", "content": prompt}
        ],
        max_tokens=500,
        n=1,
        stop=None,
        temperature=0.7,
    )
    summary = response['choices'][0]['message']['content'].strip()
    return summary

def main(api_key, openai_key, query, max_results, period, page, n_clusters=5):
    if query:
        # 期間の設定
        now = datetime.utcnow()
        published_before = now.isoformat("T") + "Z"
        if period == "1週間":
            published_after = (now - timedelta(days=7)).isoformat("T") + "Z"
        elif period == "1か月":
            published_after = (now - timedelta(days=30)).isoformat("T") + "Z"
        elif period == "3か月":
            published_after = (now - timedelta(days=90)).isoformat("T") + "Z"
        else:
            published_after = (now - timedelta(days=30)).isoformat("T") + "Z"  # デフォルトで1か月

        video_stats_df = get_video_data(api_key, query, max_results, published_after, published_before)

        if page == "Video Ranking":
            video_stats_df, fig, csv_download_link = visualize_video_ranking(video_stats_df)
            return video_stats_df, fig, csv_download_link

        elif page == "Title Analysis":
            cluster_summary_df = analyze_titles(video_stats_df, openai_key, n_clusters)
            return cluster_summary_df, None, None

iface = gr.Interface(
    fn=main,
    inputs=[
        gr.components.Textbox(label="YouTube API Keyを入力してください", type="password"),
        gr.components.Textbox(label="OpenAI API Keyを入力してください", type="password"),
        gr.components.Textbox(label="Search query"),
        gr.components.Slider(minimum=1, maximum=1000, value=5, label="Max results"),
        gr.components.Dropdown(["1週間", "1か月", "3か月"], label="Period"),
        gr.components.Dropdown(["Video Ranking", "Title Analysis"], label="Page"),
        gr.components.Slider(minimum=2, maximum=10, value=5, label="Number of clusters")
    ],
    outputs=[
        gr.components.Dataframe(label="Results"),
        gr.components.Plot(label="Plot"),
        gr.components.HTML(label="CSV Download Link")
    ],
    live=False,
    title="YouTube Analysis Tool"
)

if __name__ == "__main__":
    iface.launch()